Acupoint laser irradiation is a method of directly irradiating acupoints with low-power laser beams to treat diseases, also known as “laser needles”. Laser, that is, stimulated radiation, is the result of people’s comprehensive research on atomic physics, optics, spectroscopy, microwave technology, and quantum mechanics. It has been developed since the 1960s. Laser has the characteristics of good monochromaticity, strong coherence, excellent directionality and high energy density. Its therapeutic effect is mainly because it can produce light, heat, pressure and electromagnetic fields that have multiple effects on the human body, especially the photoelectric effect, which can dilate local blood vessels in the human body, accelerate blood flow, strengthen cell vitality, and achieve blood circulation. The purpose of removing blood stasis, reducing inflammation and relieving pain. Irradiation treatment with tiny laser beams is painless, sterile, simple, safe, adjustable in intensity, and has a wide range of adaptability. Commonly used lasers in medicine include carbon dioxide lasers, semiconductor lasers, and helium-neon lasers.